A helicopter blade starts to rotate from rest with a constant angular acceleration of 0.82 radians/second2. How many revolutions will the blade make before it is rotating at 500 revolutions per minute (RPM)

Answers

Answer 1

Revolutions made by the blade will be 266 rev

Given:

Constant angular acceleration = 0.82 radians/second^2

number of revolution per minute = 500

To Find:

number of revolution

Solution: Angular Acceleration is defined as the time rate of change of angular velocity. It is usually expressed in radians per second per second.

Initial speed of the helicopter blade, w₁ = 0

The final speed of the blade, wf = 500 rpm = 500 x 2π/60 rad/s = 52.35 rad/s

We need to find the number of revolutions. Firstly we will find the angle turned by the blade. Let the angle is θ

So,

wf^2 - wi^2 = 2αθ

θ = wf^2/2α = 1671 rad

Let there are n number of revolutions made by the blade. So,

n = θ / 2π

n = 1671 / 2 x 3.14 = 266 rev

So, the revolutions made by the blade will be 266 rev

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Related Questions

There is a scale with a basket on it. A brick, brick #1 is placed on the scale. The brick has a mass of 10 kg. What are the two forces acting on the brick?

Answers

Answer:

Weight and reaction.

Explanation:

With respect to Newton's third law of motion, action and reaction have equal magnitude but acts in opposite direction.

Thus, the brick of mass 10 kg has its weight (due to gravitational pull of the earth), which acts downwards through its center of mass. This makes the scale to produce an opposing force of equal magnitude, which acts upwards. These two forces acting in opposite directions balancing each other.

The two forces acting on the brick are: its weight and the reaction from the scale.

An orbiting satellite experiences no force due to the Earth's
gravity.

Answers

Answer:

false

Explanation:

The statement "An orbiting satellite experiences no force due to the Earth's gravity." is a False statement. This is further explained below.

What is Gravity?

Generally, Gravity is simply defined as the force that pulls items toward the center of a planet or other entity.

In conclusion, an orbiting satellite experiences force due to the Earth's gravity.

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i need help it is psychology

Answers

Answer:

C. Forebrain

Explanation:

The Basil Ganglia, sits on the base of the forebrain.

pls help i’ll give brainliest if you give a correct answer!!

Answers

Answer:

South ....................

Answer:

South ;)

Explanation:

I just did it .

The angle between the incident ray and the reflected ray from a mirror is 720.
Find the angle of incidence.

Answers

Answer:

when a ray of light is incident normally on a plane mirror the angle between incident and reflected ray is 0 degree or 180 degree

Explanation:

What is the volume of the water in the graduated cylinder gizmo Student Volume Lab Sheet (cm3 and mL)

Answers

Answer:

The volume of water in the graduated cylinder will be equal to the calculated volume of the sphere.

Explanation:

The volume of solid objects can be measured by completely immersing these solids in an overflow faucet filled to brim with a liquid in which the solid does not dissolve. This is known as the displacement method. When water is used, it is known as water displacement method.

In the Volume Lab Sheet, a sphere whose volume has been pre-calculated is immersed in the overflow faucet containing water. The displaced water is collected in a beaker and the volume is obtained using a 50 mL measuring cylinder.

The volume of a  sphere is calculated using the following formula:

Vsphere =  4πr³/ 3

The symbol π represents the number pi, which is about 3.14. The letter r stands for the  radius of the sphere, which is the distance from the center of a sphere to its surface. The  radius is exactly half of the diameter, which is the distance across the sphere through its center.

The volume of the water in the measuring cylinder is found to be equal to the calculated volume of the sphere. This is because an object immersed completely in a liquid displaces a volume of liquid equal to its own volume.

2
Type the correct answer in the box
A car has a mass of 1,000 kilograms. The weight of the car is
nenors. Use g*98 Nike for granty
Reset
Ben

Answers

Answer:

Weight = 9800Newton

Explanation:

Given the following data;

Mass of car = 1000kg

Acceleration due to gravity = 9.8m/s²

To find the weight of the car;

Weight is given by the formula;

Weight = mass * acceleration due to gravity

Substituting into the equation, we have;

Weight = 1000*9.8

Weight = 9800Newton

Is there a difference in how a black shirt or a white shirt affects our exposure to us radiation?

Answers

There is a difference of exposure to radiation to a black shirt and a white shirt but I think the difference is so insignificant that it’s not even considered different. The effects of radiation wearing a dark colored shirt on a sunny day to humans is probably not significantly different enough to warrant not wearing your favorite band tee out of fear you will get radiation poisoning.
But there is definitely a difference in heat. If you insist on wearing a black shirt and you want to avoid having a heat stroke then you should probably consider bringing water, maybe an extra shirt and sun screen if you have to be outside for more than 10-15 minutes.
Under the sun, the black shirt absorbs all wavelengths (more light). A white shirt reflects the visible light that hits it.
heat follows the same laws of conservation of light energy. This means light energy and heat cannot be created or destroyed. The light and heat has to go somewhere.
The light doesn’t cause the heat but they follow the same rules so instead of visually seeing the lack of light, you feel the heat energy that is being absorbed by your shirt.
you are exposed to the same amount of radiation wearing a black shirt as you are the white shirt. The difference is the “color” (because some people don’t consider black and white a color) and how light reacts to it.

I hope I was able to help!! This was a great question :)!!

friction is a:
A.balance force
B.unbalance force
C.type of motion
D.type of direction

Answers

Answer:

c

Explanation:

becaz its motion and without motion u cant get friction

Answer:

A

Explanation:

hope this helps

mark me brainlist

Who is farther from home at 4 minutes?

Answers

Answer:

lil's sister

hope this helps pls mark brainliest

Pick all the right ones !!

Answers

Ok it’s this.... wait your the he that got with my bf !!!


Explain why it is better to jump and land with bent knees rather than straight legs? Use key physics vocabulary.

Answers

Answer:

Bent knees

Explanation:

Depending the height your jumping from, if you were jumping from a high structure it's best if you jump and land on knees so you dont sprang your ankles from jumping and landing on your straight legs, you could even pull a muscle if you land on straight legs.

Why can videos be streamed from one computer to another with excellent quality?

Answers

Answer:

(d) they are transmitted using digital signals

Explanation:

i just did the quiz an got it right

Answer:they are transmitted using digital signals

Explanation:

Which of the following waves has the longest wavelength? Group of answer choices a.ultraviolet b.gamma c.visible light d.microwaves

Answers

Answer: visible light

Explanation:

tartaric acid is present in spinach true or false ​

Answers

Answer:

false

Explanation:

because Oxalic acid is present in spinach

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is the number of paper clips in step 2 the same as the number of paper clips in step 3? why do/don't you think so?​

Answers

We can’t see steps two or three so there isn’t a way to give you the answer that you need

The number of paper clips in step 2 is the same as the number of paper clips in step 3 is a true statement, as the mass is the same for both.

What is mass?

It is possible to define every mechanical quantity in terms of mass, length, and time. The SI unit for mass, denoted by the letter m, is the kilogram. While mass is typically thought of as an immutable feature of an item, relativistic mass must be taken into account when traveling at speeds close to the speed of light.

Given:

The mas of the paper clips are the same,

Assume the number of clips in step two is x and the mass is m, the mass in the third step is the same as in step 2,

Thus, the number of clips = Total mass of paper clip / mass of one clip,

The number of clips = m / x

As we can see, if the mass is equal, then the number of clips will also be equal.

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Urea gets from body cells to the blood plasma by diffusion through the tissue fluid. Explain what this means?

Answers

Answer:

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell.

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell. The waste product urea diffuse from the cells of the liver to the tissue fluid, and then across the capillary walls into the blood plasma.

Where did Ford first see parts made from vanadium steel?​ What properties of this steel impressed Ford? Did Ford need to overcome any problems before going ahead with his plan?

Answers

Explanation:

Historical sources believe that Henry Ford first saw parts made from vanadium steel in Europe which were been used on racing cars and luxurious vehicles.

Ford was impressed due to the fact that Vanadium steel unlike normal steel was cheaper and at the same time stronger and lighter if it was used on automobiles.

One scientist suggests that out of the different possible locations, they should design the model and build it at the equator recieves the most intense solar radiation. Which if the following is the most appropriate critique for the scientist's suggestion?
A. Earth's equator is not hot enough to simulate the Martian daytime.
B. The high mountain top gets the same amount of radiation as the equator, but with atmospheric conditions that are more similar to Mars.
C. The equator has deserts that are actually too dry compared to Mars.
D. The Antarctica has the same nighttime temperature as Mars, but with a similar amount of ice compared to the equator.​

Answers

Answer:

B.

I think.

Explanation:

Mars doesn't have that much of an atmosphere!

Have a great day!

An object can have forces acting upon it, but might not accelerate

True
or
False?

Answers

Answer:

true

Explanation:

if you apply force to the top of a square it will not move

Where do electrons spend most of their time?

Answers

Answer:

around the nuclei of each atom

Explanation:

Answer:

Before bonding, the atom's electrons spend most of their time around the nuclei of each atom.

Explanation:

Once bonded, the electrons spend most of their time between the two nuclei.

2x+1-2x=8. solve this problem math

Answers

Answer:

x=7

Explanation:

2x+1-2x=8

or,2x-2x=8-1

x=7

What is another term that refers to foodborne illness?

Answers

What the other person said !!

what is the wavelength of these waves???

Answers

Answer:

The wavelength is 6 meters.

Explanation:

Calculate the momentum of a 1kg box moving at a velocity of 50 m/s.

Answers

the momentum = m * v

m : mass

v : velocity

momentum = 1 * 50 = 50 kg.m/s

What is one enThe law of conservation of energy states that energy can neither be created nor destroyed. What does “conservation” mean in this law?ergy transformation that is taking place in the photo?

Answers

Answer:

The preservation of a physical quantity during transformations or reactions.

Explanation:

20 POINTS! PLZ HELP ME. :-)

Answers

Answer:

A

Explanation:

Because both the elements are non-metals

Which of the scientist responsible for cell theory would be the most likely to write a book titled Cells Come from Cells

Answers

Answer:

Rudolf Virchow

Explanation:

popularized the cell theory in an 1855 essay entitled “Cellular Pathology.” (b) The idea that all cells originate from other cells was first published in 1852 by his contemporary and former colleague Robert Remak (1815–1865).

Explanation:

Rudolf Virchow

-Rudolf Virchow would be the most likely to write a book titled 'Cells Come From Cells' because in cell theory he added a point that 'All cells arises from pre-existing cells. ' which means that all cells come from another cells which is as similar as the title of the book

uses of electromagnetic wave​

Answers

Radio waves - used for communication e.g. radios and TVs

Microwaves - used for cooking food and for satellite communications

Infrared light - used by electrical heaters and infrared cameras

Ultraviolet radiation - kills bacteria - sterilises water and makes it safe to drink and produces vitamin D - good for skin

if the 50 kg object slows down to a velocity of 1 m/s how much kinetic energy does it have 100j 50j 25j or none

Answers

[tex]ek = \frac{1}{2}m {v}^{2} [/tex]

[tex]ek = \frac{1}{2}(50) {(1)}^{2} [/tex]

[tex]ek = \frac{1}{2}(50)[/tex]

[tex]ek = 25j[/tex]

//

I'm not really sure but I do know that it's not 0 because the object is still moving, even if it's only moving at 1 m/s.

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